Split ThemePainter out of LayoutTheme

Source/core/paint/ThemePainterDefault.cpp

+/*
+ * Copyright (C) 2007 Apple Inc.
+ * Copyright (C) 2007 Alp Toker <alp@atoker.com>
+ * Copyright (C) 2008 Collabora Ltd.
+ * Copyright (C) 2008, 2009 Google Inc.
+ * Copyright (C) 2009 Kenneth Rohde Christiansen
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB.  If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+ */
+
+#include "config.h"
+#include "core/paint/ThemePainterDefault.h"
+
+#include "core/layout/LayoutObject.h"
+#include "core/layout/LayoutProgress.h"
+#include "core/layout/LayoutTheme.h"
+#include "core/paint/MediaControlsPainter.h"
+#include "core/paint/PaintInfo.h"
+#include "platform/LayoutTestSupport.h"
+#include "platform/graphics/Color.h"
+#include "platform/graphics/GraphicsContext.h"
+#include "platform/graphics/GraphicsContextStateSaver.h"
+#include "public/platform/Platform.h"
+#include "public/platform/WebRect.h"
+#include "public/platform/WebThemeEngine.h"
+
+namespace blink {
+
+namespace {
+
+const unsigned defaultButtonBackgroundColor = 0xffdddddd;
+
+bool useMockTheme()
+{
+    return LayoutTestSupport::isRunningLayoutTest();
+}
+
+WebThemeEngine::State getWebThemeState(const LayoutObject* o)
+{
+    if (!LayoutTheme::isEnabled(o))
+        return WebThemeEngine::StateDisabled;
+    if (useMockTheme() && LayoutTheme::isReadOnlyControl(o))
+        return WebThemeEngine::StateReadonly;
+    if (LayoutTheme::isPressed(o))
+        return WebThemeEngine::StatePressed;
+    if (useMockTheme() && LayoutTheme::isFocused(o))
+        return WebThemeEngine::StateFocused;
+    if (LayoutTheme::isHovered(o))
+        return WebThemeEngine::StateHover;
+
+    return WebThemeEngine::StateNormal;
+}
+
+class DirectionFlippingScope {
+public:
+    DirectionFlippingScope(LayoutObject*, const PaintInfo&, const IntRect&);
+    ~DirectionFlippingScope();
+
+private:
+    bool m_needsFlipping;
+    const PaintInfo& m_paintInfo;
+};
+
+DirectionFlippingScope::DirectionFlippingScope(LayoutObject* layoutObject, const PaintInfo& paintInfo, const IntRect& rect)
+    : m_needsFlipping(!layoutObject->styleRef().isLeftToRightDirection())
+    , m_paintInfo(paintInfo)
+{
+    if (!m_needsFlipping)
+        return;
+    m_paintInfo.context->save();
+    m_paintInfo.context->translate(2 * rect.x() + rect.width(), 0);
+    m_paintInfo.context->scale(-1, 1);
+}
+
+DirectionFlippingScope::~DirectionFlippingScope()
+{
+    if (!m_needsFlipping)
+        return;
+    m_paintInfo.context->restore();
+}
+
+IntRect determinateProgressValueRectFor(LayoutProgress* layoutProgress, const IntRect& rect)
+{
+    int dx = rect.width() * layoutProgress->position();
+    return IntRect(rect.x(), rect.y(), dx, rect.height());
+}
+
+IntRect indeterminateProgressValueRectFor(LayoutProgress* layoutProgress, const IntRect& rect)
+{
+    // Value comes from default of GTK+.
+    static const int progressActivityBlocks = 5;
+
+    int valueWidth = rect.width() / progressActivityBlocks;
+    int movableWidth = rect.width() - valueWidth;
+    if (movableWidth <= 0)
+        return IntRect();
+
+    double progress = layoutProgress->animationProgress();
+    if (progress < 0.5)
+        return IntRect(rect.x() + progress * 2 * movableWidth, rect.y(), valueWidth, rect.height());
+    return IntRect(rect.x() + (1.0 - progress) * 2 * movableWidth, rect.y(), valueWidth, rect.height());
+}
+
+IntRect progressValueRectFor(LayoutProgress* layoutProgress, const IntRect& rect)
+{
+    return layoutProgress->isDeterminate() ? determinateProgressValueRectFor(layoutProgress, rect) : indeterminateProgressValueRectFor(layoutProgress, rect);
+}
+
+IntRect convertToPaintingRect(LayoutObject* inputLayoutObject, const LayoutObject* partLayoutObject, LayoutRect partRect, const IntRect& localOffset)
+{
+    // Compute an offset between the partLayoutObject and the inputLayoutObject.
+    LayoutSize offsetFromInputLayoutObject = -partLayoutObject->offsetFromAncestorContainer(inputLayoutObject);
+    // Move the rect into partLayoutObject's coords.
+    partRect.move(offsetFromInputLayoutObject);
+    // Account for the local drawing offset.
+    partRect.move(localOffset.x(), localOffset.y());
+
+    return pixelSnappedIntRect(partRect);
+}
+
+} // namespace
+
+bool ThemePainterDefault::paintCheckbox(LayoutObject* o, const PaintInfo& i, const IntRect& rect)
+{
+    WebThemeEngine::ExtraParams extraParams;
+    WebCanvas* canvas = i.context->canvas();
+    extraParams.button.checked = LayoutTheme::isChecked(o);
+    extraParams.button.indeterminate = LayoutTheme::isIndeterminate(o);
+
+    float zoomLevel = o->style()->effectiveZoom();
+    GraphicsContextStateSaver stateSaver(*i.context, false);
+    IntRect unzoomedRect = rect;
+    if (zoomLevel != 1) {
+        stateSaver.save();
+        unzoomedRect.setWidth(unzoomedRect.width() / zoomLevel);
+        unzoomedRect.setHeight(unzoomedRect.height() / zoomLevel);
+        i.context->translate(unzoomedRect.x(), unzoomedRect.y());
+        i.context->scale(zoomLevel, zoomLevel);
+        i.context->translate(-unzoomedRect.x(), -unzoomedRect.y());
+    }
+
+    Platform::current()->themeEngine()->paint(canvas, WebThemeEngine::PartCheckbox, getWebThemeState(o), WebRect(unzoomedRect), &extraParams);
+    return false;
+}
+
+bool ThemePainterDefault::paintRadio(LayoutObject* o, const PaintInfo& i, const IntRect& rect)
+{
+    WebThemeEngine::ExtraParams extraParams;
+    WebCanvas* canvas = i.context->canvas();
+    extraParams.button.checked = LayoutTheme::isChecked(o);
+
+    Platform::current()->themeEngine()->paint(canvas, WebThemeEngine::PartRadio, getWebThemeState(o), WebRect(rect), &extraParams);
+    return false;
+}
+
+bool ThemePainterDefault::paintButton(LayoutObject* o, const PaintInfo& i, const IntRect& rect)
+{
+    WebThemeEngine::ExtraParams extraParams;
+    WebCanvas* canvas = i.context->canvas();
+    extraParams.button.hasBorder = true;
+    extraParams.button.backgroundColor = useMockTheme() ? 0xffc0c0c0 : defaultButtonBackgroundColor;
+    if (o->hasBackground())
+        extraParams.button.backgroundColor = o->resolveColor(CSSPropertyBackgroundColor).rgb();
+
+    Platform::current()->themeEngine()->paint(canvas, WebThemeEngine::PartButton, getWebThemeState(o), WebRect(rect), &extraParams);
+    return false;
+}
+
+bool ThemePainterDefault::paintTextField(LayoutObject* o, const PaintInfo& i, const IntRect& rect)
+{
+    // WebThemeEngine does not handle border rounded corner and background image
+    // so return true to draw CSS border and background.
+    if (o->style()->hasBorderRadius() || o->style()->hasBackgroundImage())
+        return true;
+
+    ControlPart part = o->style()->appearance();
+
+    WebThemeEngine::ExtraParams extraParams;
+    extraParams.textField.isTextArea = part == TextAreaPart;
+    extraParams.textField.isListbox = part == ListboxPart;
+
+    WebCanvas* canvas = i.context->canvas();
+
+    Color backgroundColor = o->resolveColor(CSSPropertyBackgroundColor);
+    extraParams.textField.backgroundColor = backgroundColor.rgb();
+
+    Platform::current()->themeEngine()->paint(canvas, WebThemeEngine::PartTextField, getWebThemeState(o), WebRect(rect), &extraParams);
+    return false;
+}
+
+bool ThemePainterDefault::paintMenuList(LayoutObject* o, const PaintInfo& i, const IntRect& rect)
+{
+    if (!o->isBox())
+        return false;
+
+    const int right = rect.x() + rect.width();
+    const int middle = rect.y() + rect.height() / 2;
+
+    WebThemeEngine::ExtraParams extraParams;
+    extraParams.menuList.arrowY = middle;
+    const LayoutBox* box = toLayoutBox(o);
+    // Match Chromium Win behaviour of showing all borders if any are shown.
+    extraParams.menuList.hasBorder = box->borderRight() || box->borderLeft() || box->borderTop() || box->borderBottom();
+    extraParams.menuList.hasBorderRadius = o->style()->hasBorderRadius();
+    // Fallback to transparent if the specified color object is invalid.
+    Color backgroundColor(Color::transparent);
+    if (o->hasBackground())
+        backgroundColor = o->resolveColor(CSSPropertyBackgroundColor);
+    extraParams.menuList.backgroundColor = backgroundColor.rgb();
+
+    // If we have a background image, don't fill the content area to expose the
+    // parent's background. Also, we shouldn't fill the content area if the
+    // alpha of the color is 0. The API of Windows GDI ignores the alpha.
+    // FIXME: the normal Aura theme doesn't care about this, so we should
+    // investigate if we really need fillContentArea.
+    extraParams.menuList.fillContentArea = !o->style()->hasBackgroundImage() && backgroundColor.alpha();
+
+    if (useMockTheme()) {
+        // The size and position of the drop-down button is different between
+        // the mock theme and the regular aura theme.
+        int spacingTop = box->borderTop() + box->paddingTop();
+        int spacingBottom = box->borderBottom() + box->paddingBottom();
+        int spacingRight = box->borderRight() + box->paddingRight();
+        extraParams.menuList.arrowX = (o->style()->direction() == RTL) ? rect.x() + 4 + spacingRight: right - 13 - spacingRight;
+        extraParams.menuList.arrowHeight = rect.height() - spacingBottom - spacingTop;
+    } else {
+        extraParams.menuList.arrowX = (o->style()->direction() == RTL) ? rect.x() + 7 : right - 13;
+    }
+
+    WebCanvas* canvas = i.context->canvas();
+
+    Platform::current()->themeEngine()->paint(canvas, WebThemeEngine::PartMenuList, getWebThemeState(o), WebRect(rect), &extraParams);
+    return false;
+}
+
+bool ThemePainterDefault::paintMenuListButton(LayoutObject* o, const PaintInfo& i, const IntRect& rect)
+{
+    if (!o->isBox())
+        return false;
+
+    const int right = rect.x() + rect.width();
+    const int middle = rect.y() + rect.height() / 2;
+
+    WebThemeEngine::ExtraParams extraParams;
+    extraParams.menuList.arrowY = middle;
+    extraParams.menuList.hasBorder = false;
+    extraParams.menuList.hasBorderRadius = o->style()->hasBorderRadius();
+    extraParams.menuList.backgroundColor = Color::transparent;
+    extraParams.menuList.fillContentArea = false;
+
+    if (useMockTheme()) {
+        const LayoutBox* box = toLayoutBox(o);
+        // The size and position of the drop-down button is different between
+        // the mock theme and the regular aura theme.
+        int spacingTop = box->borderTop() + box->paddingTop();
+        int spacingBottom = box->borderBottom() + box->paddingBottom();
+        int spacingRight = box->borderRight() + box->paddingRight();
+        extraParams.menuList.arrowX = (o->style()->direction() == RTL) ? rect.x() + 4 + spacingRight: right - 13 - spacingRight;
+        extraParams.menuList.arrowHeight = rect.height() - spacingBottom - spacingTop;
+    } else {
+        extraParams.menuList.arrowX = (o->style()->direction() == RTL) ? rect.x() + 7 : right - 13;
+    }
+
+    WebCanvas* canvas = i.context->canvas();
+
+    Platform::current()->themeEngine()->paint(canvas, WebThemeEngine::PartMenuList, getWebThemeState(o), WebRect(rect), &extraParams);
+    return false;
+}
+
+bool ThemePainterDefault::paintSliderTrack(LayoutObject* o, const PaintInfo& i, const IntRect& rect)
+{
+    WebThemeEngine::ExtraParams extraParams;
+    WebCanvas* canvas = i.context->canvas();
+    extraParams.slider.vertical = o->style()->appearance() == SliderVerticalPart;
+
+    paintSliderTicks(o, i, rect);
+
+    // FIXME: Mock theme doesn't handle zoomed sliders.
+    float zoomLevel = useMockTheme() ? 1 : o->style()->effectiveZoom();
+    GraphicsContextStateSaver stateSaver(*i.context, false);
+    IntRect unzoomedRect = rect;
+    if (zoomLevel != 1) {
+        stateSaver.save();
+        unzoomedRect.setWidth(unzoomedRect.width() / zoomLevel);
+        unzoomedRect.setHeight(unzoomedRect.height() / zoomLevel);
+        i.context->translate(unzoomedRect.x(), unzoomedRect.y());
+        i.context->scale(zoomLevel, zoomLevel);
+        i.context->translate(-unzoomedRect.x(), -unzoomedRect.y());
+    }
+
+    Platform::current()->themeEngine()->paint(canvas, WebThemeEngine::PartSliderTrack, getWebThemeState(o), WebRect(unzoomedRect), &extraParams);
+
+    return false;
+}
+
+bool ThemePainterDefault::paintSliderThumb(LayoutObject* o, const PaintInfo& i, const IntRect& rect)
+{
+    WebThemeEngine::ExtraParams extraParams;
+    WebCanvas* canvas = i.context->canvas();
+    extraParams.slider.vertical = o->style()->appearance() == SliderThumbVerticalPart;
+    extraParams.slider.inDrag = LayoutTheme::isPressed(o);
+
+    // FIXME: Mock theme doesn't handle zoomed sliders.
+    float zoomLevel = useMockTheme() ? 1 : o->style()->effectiveZoom();
+    GraphicsContextStateSaver stateSaver(*i.context, false);
+    IntRect unzoomedRect = rect;
+    if (zoomLevel != 1) {
+        stateSaver.save();
+        unzoomedRect.setWidth(unzoomedRect.width() / zoomLevel);
+        unzoomedRect.setHeight(unzoomedRect.height() / zoomLevel);
+        i.context->translate(unzoomedRect.x(), unzoomedRect.y());
+        i.context->scale(zoomLevel, zoomLevel);
+        i.context->translate(-unzoomedRect.x(), -unzoomedRect.y());
+    }
+
+    Platform::current()->themeEngine()->paint(canvas, WebThemeEngine::PartSliderThumb, getWebThemeState(o), WebRect(unzoomedRect), &extraParams);
+    return false;
+}
+
+bool ThemePainterDefault::paintInnerSpinButton(LayoutObject* o, const PaintInfo& i, const IntRect& rect)
+{
+    WebThemeEngine::ExtraParams extraParams;
+    WebCanvas* canvas = i.context->canvas();
+    extraParams.innerSpin.spinUp = (LayoutTheme::controlStatesForLayoutObject(o) & SpinUpControlState);
+    extraParams.innerSpin.readOnly = LayoutTheme::isReadOnlyControl(o);
+
+    Platform::current()->themeEngine()->paint(canvas, WebThemeEngine::PartInnerSpinButton, getWebThemeState(o), WebRect(rect), &extraParams);
+    return false;
+}
+
+bool ThemePainterDefault::paintProgressBar(LayoutObject* o, const PaintInfo& i, const IntRect& rect)
+{
+    if (!o->isProgress())
+        return true;
+
+    LayoutProgress* layoutProgress = toLayoutProgress(o);
+    IntRect valueRect = progressValueRectFor(layoutProgress, rect);
+
+    WebThemeEngine::ExtraParams extraParams;
+    extraParams.progressBar.determinate = layoutProgress->isDeterminate();
+    extraParams.progressBar.valueRectX = valueRect.x();
+    extraParams.progressBar.valueRectY = valueRect.y();
+    extraParams.progressBar.valueRectWidth = valueRect.width();
+    extraParams.progressBar.valueRectHeight = valueRect.height();
+
+    DirectionFlippingScope scope(o, i, rect);
+    WebCanvas* canvas = i.context->canvas();
+    Platform::current()->themeEngine()->paint(canvas, WebThemeEngine::PartProgressBar, getWebThemeState(o), WebRect(rect), &extraParams);
+    return false;
+}
+
+bool ThemePainterDefault::paintTextArea(LayoutObject* o, const PaintInfo& i, const IntRect& r)
+{
+    return paintTextField(o, i, r);
+}
+
+bool ThemePainterDefault::paintSearchField(LayoutObject* o, const PaintInfo& i, const IntRect& r)
+{
+    return paintTextField(o, i, r);
+}
+
+bool ThemePainterDefault::paintSearchFieldCancelButton(LayoutObject* cancelButtonObject, const PaintInfo& paintInfo, const IntRect& r)
+{
+    // Get the layoutObject of <input> element.
+    if (!cancelButtonObject->node())
+        return false;
+    Node* input = cancelButtonObject->node()->shadowHost();
+    LayoutObject* baseLayoutObject = input ? input->layoutObject() : cancelButtonObject;
+    if (!baseLayoutObject->isBox())
+        return false;
+    LayoutBox* inputLayoutBox = toLayoutBox(baseLayoutObject);
+    LayoutRect inputContentBox = inputLayoutBox->contentBoxRect();
+
+    // Make sure the scaled button stays square and will fit in its parent's box.
+    LayoutUnit cancelButtonSize = std::min(inputContentBox.width(), std::min<LayoutUnit>(inputContentBox.height(), r.height()));
+    // Calculate cancel button's coordinates relative to the input element.
+    // Center the button vertically.  Round up though, so if it has to be one pixel off-center, it will
+    // be one pixel closer to the bottom of the field.  This tends to look better with the text.
+    LayoutRect cancelButtonRect(cancelButtonObject->offsetFromAncestorContainer(inputLayoutBox).width(),
+        inputContentBox.y() + (inputContentBox.height() - cancelButtonSize + 1) / 2,
+        cancelButtonSize, cancelButtonSize);
+    IntRect paintingRect = convertToPaintingRect(inputLayoutBox, cancelButtonObject, cancelButtonRect, r);
+
+    DEFINE_STATIC_REF(Image, cancelImage, (Image::loadPlatformResource("searchCancel")));
+    DEFINE_STATIC_REF(Image, cancelPressedImage, (Image::loadPlatformResource("searchCancelPressed")));
+    paintInfo.context->drawImage(LayoutTheme::isPressed(cancelButtonObject) ? cancelPressedImage : cancelImage, paintingRect);
+    return false;
+}
+
+bool ThemePainterDefault::paintSearchFieldResultsDecoration(LayoutObject* magnifierObject, const PaintInfo& paintInfo, const IntRect& r)
+{
+    // Get the layoutObject of <input> element.
+    if (!magnifierObject->node())
+        return false;
+    Node* input = magnifierObject->node()->shadowHost();
+    LayoutObject* baseLayoutObject = input ? input->layoutObject() : magnifierObject;
+    if (!baseLayoutObject->isBox())
+        return false;
+    LayoutBox* inputLayoutBox = toLayoutBox(baseLayoutObject);
+    LayoutRect inputContentBox = inputLayoutBox->contentBoxRect();
+
+    // Make sure the scaled decoration stays square and will fit in its parent's box.
+    LayoutUnit magnifierSize = std::min(inputContentBox.width(), std::min<LayoutUnit>(inputContentBox.height(), r.height()));
+    // Calculate decoration's coordinates relative to the input element.
+    // Center the decoration vertically.  Round up though, so if it has to be one pixel off-center, it will
+    // be one pixel closer to the bottom of the field.  This tends to look better with the text.
+    LayoutRect magnifierRect(magnifierObject->offsetFromAncestorContainer(inputLayoutBox).width(),
+        inputContentBox.y() + (inputContentBox.height() - magnifierSize + 1) / 2,
+        magnifierSize, magnifierSize);
+    IntRect paintingRect = convertToPaintingRect(inputLayoutBox, magnifierObject, magnifierRect, r);
+
+    DEFINE_STATIC_REF(Image, magnifierImage, (Image::loadPlatformResource("searchMagnifier")));
+    paintInfo.context->drawImage(magnifierImage, paintingRect);
+    return false;
+}
+
+bool ThemePainterDefault::paintMediaSliderTrack(LayoutObject* object, const PaintInfo& paintInfo, const IntRect& rect)
+{
+    return MediaControlsPainter::paintMediaControlsPart(MediaSlider, object, paintInfo, rect);
+}
+
+bool ThemePainterDefault::paintMediaVolumeSliderTrack(LayoutObject* object, const PaintInfo& paintInfo, const IntRect& rect)
+{
+    return MediaControlsPainter::paintMediaControlsPart(MediaVolumeSlider, object, paintInfo, rect);
+}
+
+bool ThemePainterDefault::paintMediaSliderThumb(LayoutObject* object, const PaintInfo& paintInfo, const IntRect& rect)
+{
+    return MediaControlsPainter::paintMediaControlsPart(MediaSliderThumb, object, paintInfo, rect);
+}
+
+bool ThemePainterDefault::paintMediaToggleClosedCaptionsButton(LayoutObject* o, const PaintInfo& paintInfo, const IntRect& r)
+{
+    return MediaControlsPainter::paintMediaControlsPart(MediaShowClosedCaptionsButton, o, paintInfo, r);
+}
+
+bool ThemePainterDefault::paintMediaCastButton(LayoutObject* o, const PaintInfo& paintInfo, const IntRect& r)
+{
+    return MediaControlsPainter::paintMediaControlsPart(MediaCastOffButton, o, paintInfo, r);
+}
+
+bool ThemePainterDefault::paintMediaVolumeSliderThumb(LayoutObject* object, const PaintInfo& paintInfo, const IntRect& rect)
+{
+    return MediaControlsPainter::paintMediaControlsPart(MediaVolumeSliderThumb, object, paintInfo, rect);
+}
+
+bool ThemePainterDefault::paintMediaPlayButton(LayoutObject* object, const PaintInfo& paintInfo, const IntRect& rect)
+{
+    return MediaControlsPainter::paintMediaControlsPart(MediaPlayButton, object, paintInfo, rect);
+}
+
+bool ThemePainterDefault::paintMediaOverlayPlayButton(LayoutObject* object, const PaintInfo& paintInfo, const IntRect& rect)
+{
+    return MediaControlsPainter::paintMediaControlsPart(MediaOverlayPlayButton, object, paintInfo, rect);
+}
+
+bool ThemePainterDefault::paintMediaMuteButton(LayoutObject* object, const PaintInfo& paintInfo, const IntRect& rect)
+{
+    return MediaControlsPainter::paintMediaControlsPart(MediaMuteButton, object, paintInfo, rect);
+}
+
+bool ThemePainterDefault::paintMediaFullscreenButton(LayoutObject* object, const PaintInfo& paintInfo, const IntRect& rect)
+{
+    return MediaControlsPainter::paintMediaControlsPart(MediaEnterFullscreenButton, object, paintInfo, rect);
+}
+
+} // namespace blink